Ecohydrological processes are often evaluated by studying the fate of stable water isotopes. However, isotopic fractionation during evaporation is ignored or simplified in current models, resulting simulation errors that may be propagated into practical applications isotope tracing. In this study, we adapted and tested HYDRUS-1D model, a numerical model widely used to simulate variably-saturate...

Abstract The coupled MODFLOW-HYDRUS software package was used to produce a saturated-unsaturated flow model for a Flood Spreading System (FSS) and its associated aquifer. The study aim to improve simulations of near-surface hydrological processes, including temporal and spatial variation in groundwater recharge rates. The coupled model was built with average RMSE=1.1 and 1.3 for calibration ...

The movement of bacterial and viral pathogens through soil vadose zone subsequently into groundwater is a major public health concern. There are relatively few studies on the transport fate microbes variably saturated media compared with their in zones. In this study, we investigated Escherichia coli, F-RNA bacteriophage MS2, conservative solute tracer bromide three intact cores, under (dischar...

The HYDRUS-1D and HYDRUS (2D/3D) computer software packages are widely used finite element models for simulating the one-, and twoor three-dimensional movement of water, heat, and multiple solutes in variably-saturated media, respectively. While the standard HYDRUS models consider only the fate and transport of individual solutes or solutes subject to first-order degradation reactions, several ...

A variational formulation has been developed to solve a parabolic partial differential equation describing free-surface flows in a porous medium. The variational finite element method is used to obtain a discrete form of equations for a two-dimensional domain. The matrix characteristics and the stability criteria have been investigated to develop a stable numerical algorithm for solving the gov...

A physically based, variably saturated flow model was developed to predict soil water dynamics, evapotranspiration (ET) from the vadose zone, and recharge to (or exfiltration from) the saturated zone using mean daily atmospheric forcings and to identify the value of diurnal climate forcings on those predictions. The vadose zone flow is modelled using the Galerkin finite element technique to sol...

Better representations of groundwater processes need to be incorporated into large-scale hydrological models improve simulations regional- global-scale hydrology and climate, as well understanding feedbacks between the human natural systems. We a 2D flow model variable infiltration capacity (VIC) code address its lack lateral component. The water table was coupled with variably saturated VIC so...

In order to investigate chlorine isotope behaviour, it was necessary to develop analytical methods and methods for data interpretation. The accuracy, precision and amount dependency of chlorine isotope ratio analyses performed with gas chromatography quadrupol mass-spectrometry (GC-qMS) were evaluated for two Agilent and Thermo instruments. The calibration of raw data to SMOC scale (Standard Me...